Dimension-six electroweak top-loop effects in Higgs production and decay

doi:10.1007/JHEP08(2018)036

	Dimension-six electroweak top-loop effects in Higgs production and decay
	Zhang, C; Vryonidou, E; Zhang C(张岑)
刊名	JOURNAL OF HIGH ENERGY PHYSICS
	2018
期号	8 页码:36
关键词	Heavy Quark Physics Higgs Physics Effective Field Theories Beyond Standard Model
ISSN号	1029-8479
DOI	10.1007/JHEP08(2018)036
文献子类	Article
英文摘要	We study the next-to-leading order electroweak corrections to Higgs processes from dimension-six top-quark operators in the Standard Model Effective Field Theory approach. We consider the major production channels, including WH, ZH, and VBF production at the LHC, and ZH, VBF production at future lepton colliders, as well as the major decay channels including H -> gamma gamma, gamma Z, Wl nu, Zll, b (b) over bar, mu mu, tau tau. The results show that within the current constraints, top-quark operators can shift the signal strength of the loop-induced processes, i.e. H -> gamma gamma, gamma Z, by factors of similar to O(1) - O(10), and that of the tree-level processes, i.e. all remaining production and decay channels, by similar to 5 - 10% at the LHC, and up to similar to 15% at future lepton colliders. This implies that essentially all Higgs channels have started to become sensitive to top-quark couplings, and in particular, Higgs observables at high luminosity LHC as well as future lepton colliders, even below the t (t) over bar threshold, will improve our knowledge of top-quark couplings. We derive the sensitivities of Higgs measurements to top-quark operators at the high luminosity LHC, using projections for both inclusive and differential measurements. We conclude that treating the dimension-six top-quark sector and the Higgs/electroweak sector separately may not continue to be a good strategy. A global analysis combining Higgs and top-quark measurements is desirable, and our calculation and implementation provide an automatic and realistic simulation tool for this purpose.
WOS关键词	EFFECTIVE-FIELD THEORY ; AMPLITUDES ; LEVEL
WOS研究方向	Physics
语种	英语
WOS记录号	WOS:000441224900002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/286201]
专题	高能物理研究所_理论物理室
通讯作者	Zhang C(张岑)
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhang, C,Vryonidou, E,Zhang C. Dimension-six electroweak top-loop effects in Higgs production and decay[J]. JOURNAL OF HIGH ENERGY PHYSICS,2018(8):36.
APA	Zhang, C,Vryonidou, E,&张岑.(2018).Dimension-six electroweak top-loop effects in Higgs production and decay.JOURNAL OF HIGH ENERGY PHYSICS(8),36.
MLA	Zhang, C,et al."Dimension-six electroweak top-loop effects in Higgs production and decay".JOURNAL OF HIGH ENERGY PHYSICS .8(2018):36.